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3 years ago

Which of the following are true about x? Check all that apply.

Mathematics

2 answers:

Paul [167]3 years ago

8 0

Answer:

The following are correct:

Step-by-step explanation

Anna71 [15]3 years ago

5 0

Answer:

x∈B

x∈A∪B

x∈A∪C

x∈A∩B

Step-by-step explanation:

As can be seen from the Venn diagram, x is the shaded portion between the intersection of 3 circles A, B and C.

hence x belong to b, and x belong to A union B, x belong to A union C and x belong to A intersection B !

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A rocket is launched from a tower. The height of the rocket, y in feet, is related to the time after launch, x in seconds, by th

Bond [772]

Answer:

The time that the rocket will hit the ground will be:

x = 17.40 seconds

Step-by-step explanation:

Given the expression

$f\left(x\right)\:=-16x^2+272x+110$

Here:

x represents the time in seconds

y represents the height of the rocket

We know that when the rocket will hit the ground, the height will get y = 0

i.e.

$0\:=-16x^2+272x+110$

solving for x to determine the time that the rocket takes when it will hit the ground.

$-16x^2+272x+110=0$

subtract 110 from both sides

$-16x^2+272x+110-110=0-110$

$-16x^2+272x=-110$

Divide both sides by -16

$\frac{-16x^2+272x}{-16}=\frac{-110}{-16}$

$x^2-17x=\frac{55}{8}$

$\mathrm{Add\:}\left(-\frac{17}{2}\right)^2\mathrm{\:to\:both\:sides}$

$x^2-17x+\left(-\frac{17}{2}\right)^2=\frac{55}{8}+\left(-\frac{17}{2}\right)^2$

$x^2-17x+\left(-\frac{17}{2}\right)^2=\frac{633}{8}$

$\left(x-\frac{17}{2}\right)^2=\frac{633}{8}$

$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solving

$x-\frac{17}{2}=\sqrt{\frac{633}{8}}$

$x=\frac{\sqrt{1266}}{4}+\frac{17}{2}$

x = 17.40 seconds

also solving

$x-\frac{17}{2}=-\sqrt{\frac{633}{8}}$

$x=-\frac{\sqrt{1266}}{4}+\frac{17}{2}$

x = -0.40 seconds

As time can not be negative.

Thus, the value of x = 17.40 seconds

Therefore, the time that the rocket will hit the ground will be:

x = 17.40 seconds

4 0

3 years ago

The width of a human hair is about 1* 10^-4 meter wide.

Licemer1 [7]

Answer: The answer is 7.

Step-by-step explanation:

1*10^-4 equals 0.001 and 7*10^-4 equals 0.007 so 0.007 divided by 0.001 is 7. I hope this makes sense !

7 0

2 years ago

WHO WANTS BRAINIEST? WHOEVER ANSWER CORRECTLY ILL GIVE YOU BRAINIEST

castortr0y [4]

Answer:

7, true, sextic binomial

Step-by-step explanation:

highest degree is 7, it is a monomial, 6th degree two terms.

8 0

3 years ago

Please help!

NNADVOKAT [17]

Answer:

The equation would be 2,250 - 120<em>m</em>

7 0

3 years ago

Avery has $3. She earns $1.20 for each chore she does. (She can complete fractions of

Sonja [21]

Answer:

She would have to do a chore 11.25 times

Step-by-step explanation:

well first you would divide 1.20 by 13.50 and get 11.25 and then add the $3 to it and get 14.25 and that would be enough money for the game

please mark brainliest

5 0

3 years ago